Mobility of low-angle grain boundaries in pure metals

Stress-driven migration of simple low-angle mixed grain boundaries

We investigated the stress-induced migration of a class of simple low-angle mixed grain boundaries (LAMGBs) using a combination of discrete dislocation dynamics simulations and analytical arguments. The migration of LAMGBs under an externally applied stress can occur by dislocation glide, and was observed to be coupled to the motion parallel to the boundary plane, i.e. tangential motion. Both t...

From the Cover: Nanoscale waviness of low-angle grain boundaries

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Transition between Low and High Angle Grain Boundaries

Institut für Metallkunde und Metallphysik, RWTH Aachen, 52056 Aachen, Germany Carnegie Mellon University, Pittsburgh PA 15213, USA Abstract The migration of planar, symmetric tilt grain boundaries with different tilt axes was investigated. The driving force for the grain boundary migration was due to an external mechanical stress field. Low as well as high angle grain boundaries can move under ...

Computer Modeling of Grain Boundaries in Cubic Metals

The current knowledge of grain boundary structure in cubic crystals modeled by computer simulation techniques is reviewed. The advantages and limitations of the methods and interatomic potentials employed are detailed and emphasized. Two different approaches are described: firstly, examples are given of individual special boundary structures that have matched well with particular experimental o...

Segregation of Interstitial Impurities at Grain Boundaries in Transition Metals